高原环境下重型车辆排放物生成机制分析  

Analysis of emission generation mechanism of heavy vehicles in plateau environment

作　　者：周承忠[1,2] 郭晓宇 李明星 叶宇[2] 黄豪中[1] ZHOU Chengzhong;GUO Xiaoyu;LI Mingxing;YE Yu;HUANG Haozhong(School of Mechanical Engineering,Guangxi University,Nanning 530004,China;Guangxi Yuchai Machinery Co.,Ltd.,Yulin 537005,China)

机构地区：[1]广西大学机械工程学院,广西南宁530004 [2]广西玉柴机器股份有限公司,广西玉林537005

出　　处：《广西大学学报（自然科学版）》2024年第4期816-825,共10页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金项目(52366007);广西科技重大专项(AA22068103)。

摘　　要：针对高原环境下重型车辆排放物生成机制尚不清晰的问题,以1辆搭载国六重型柴油发动机的车辆作为研究对象,在海拔2 400 m左右高原环境下,利用便携式排放测量系统(PEMS)设备,对不同负荷工况车辆冷启动过程排放污染物的瞬态变化趋势进行了研究。结果表明,受高原稀薄空气的影响,运行前期,车辆在高负荷工况下CO排放更高,且与10%和50%负荷不同,100%负荷下,NOx、NO和NO2排放峰值主要出现在运行时间300~500 s;在高负荷工况下,车辆碳烟颗粒排放量高,但水温增加后,碳烟颗粒排放迅速下降。冷起动过程中CO、NOx和碳烟颗粒数量浓度(PN)仍是排放污染物控制的关键项目,特别是在高原环境下。In response to the unclear emission generation mechanism of heavy vehicles in plateau environment,using a vehicle equipped with a National VI heavy duty diesel engine as the research object,in a plateau environment of around 2400 meters,portable emission measurement system equipment(PEMS)was used to study the transient trend of pollutant emissions during cold start of vehicles under different load conditions.The research results indicated that,influenced by the thin air on the plateau,vehicles emit higher CO emissions under high load conditions in the early stage of operation,and unlike 10%and 50%loads,the emissions peak values of NO x,NO,and NO 2 mainly occur during the operating time of 300~500 s under 100%load.In addition,under high load conditions,vehicles emit a high amount of soot particle,but as the water temperature increases,soot particle emissions rapidly decrease.Therefore,the CO,NO x,and PN emissions during cold start are still key projects for controlling pollutants,especially in plateau environment.

关 键 词：高原环境 重型柴油发动机 碳烟颗粒 

分 类 号：TK46[动力工程及工程热物理—动力机械及工程]